| Title |
Analysis of Turbine-Generator Shaft System Mechanical Torque Response based on Turbine Blade Modeling |
| Authors |
박지경(Park, Ji-Kyung) ; 정세진(Chung, Se-Jin) ; 김철환(Kim, Chul-Hwan) |
| DOI |
https://doi.org/10.5370/KIEE.2015.64.9.1269 |
| Keywords |
Mechanical-electrical analogy ; Mode frequency ; Turbine blade ; Turbine-generator shaft system ; Torsional response |
| Abstract |
Turbine-generator torsional response is caused by interaction between electrical transient air-gap torque and mechanical characteristics of turbine-generator shafts. There are various factors that affects torsional interaction such as fault, circuit breaker switching and generator mal-synchronizing, etc. Fortunately, we can easily simulate above torsional interaction phenomena by using ElectroMagnetic Transient Program (EMTP). However, conventional EMTP shows the incomplete response of super- synchronous torsional mode since it does not consider turbine blade section. Therefore, in this paper, we introduced mechanical-electrical analogy for detailed modeling of turbine-generator shaft system including low pressure turbine blade section. In addition, we derived the natural frequencies of modeled turbine-generator shaft system including turbine blade section and analyzed the characteristics of mechanical torque response at shaft coupling and turbine blade root area according to power system balanced/unbalanced faults. |